DiatomBase
Between brackets is the number of accepted extant species
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- Bacillariophyceae (5 957)
- Subclass Bacillariophyceae incertae sedis (189)
- Subclass Bacillariophycidae (4 408)
- Subclass Coscinodiscophycidae (877)
- Superorder Biddulphianae (230)
- Order Anaulales (7)
- Order Biddulphiales (38)
- Order Hemiaulales (17)
- Family Bellerocheaceae Crawford, 1990
- Family Hemiaulaceae Heiberg, 1863 (17)
- Genus Abas R.Ross & P.A.Sims, 1980 †
- Genus Ailuretta P.A. Sims, 1986 †
- Genus Baxteriopsis G. Karsten in A. Engler & K. Prantl, 1928 †
- Genus Bicornis J. Fenner, 1994 † accepted as Fennerbicornis Blanco, 2020 †
- Genus Briggera R. Ross & P.A. Sims, 1985 †
- Genus Cerataulina H. Peragallo ex F. Schütt in Engler & Prantl, 1896
- Genus Climacodium A. Grunow, 1868 (1)
- Genus Cylindrospira A.G.Mitlehner, 1995 †
- Genus Eucampia C.G. Ehrenberg, 1839 (1)
- Genus Fennerbicornis Blanco, 2020 †
- Genus Hemiaulus P.A.C. Heiberg, 1863 (10)
- Species Hemiaulus abnormis Strelnikova in Dzinoridze, Jouse & Strelnikova, 1979
- Species Hemiaulus affinis Grunow in Van Heurck, 1883
- Species Hemiaulus affixus Ross, 1971
- Species Hemiaulus africanus Leuduger-Fortmorel, 1898
- Species Hemiaulus alatus Greville, 1865 accepted as Williamriedelia alata (Grev.) S.Blanco & C.E.Wetzel, 2016 †
- Species Hemiaulus algidus Grunow, 1884
- Species Hemiaulus altar Brun, 1896 † accepted as Williamriedelia altar (Brun) S.Blanco & C.E.Wetzel, 2016 †
- Species Hemiaulus altus Hajós, 1974
- Species Hemiaulus ambiguus Janisch in Schmidt et al., 1888
- Species Hemiaulus amplectens
- Species Hemiaulus andrewsi Hajós, 1974
- Species Hemiaulus angularis Leuduger-Fortmorel, 1898
- Species Hemiaulus angustobrachiatus M.P. Olney in Olney et al., 2007
- Species Hemiaulus angustus Greville, 1865
- Species Hemiaulus antarcticus Ehrenberg, 1844
- Species Hemiaulus antarcticus sensu Weisse, 1854
- Species Hemiaulus antiquus Jousé, 1951
- Species Hemiaulus antiquus (Pantocsek)
- Species Hemiaulus applanatus Brun, 1891
- Species Hemiaulus arcticus Grunow
- Species Hemiaulus aries (Schmidt in Schmidt et al.) M. Peragallo, 1897 accepted as Trinacria aries Schmidt in Schmidt et al., 1886 †
- Species Hemiaulus armatus Leuduger-Fortmorel, 1898
- Species Hemiaulus asymmetricus Jousé, 1951
- Species Hemiaulus auckii Castracane, 1875
- Species Hemiaulus australis Ehrenberg, 1844
- Species Hemiaulus barbadensis Grunow, 1884
- Species Hemiaulus beatus Fenner, 1991
- Species Hemiaulus biddulphia Leuduger-Fortmorel, 1898
- Species Hemiaulus bifrons (Ehrenberg) Grunow, 1884
- Species Hemiaulus biharensis Pantocsek, 1892
- Species Hemiaulus bipons (Ehrenberg) Grunow in Van Heurck, 1882 accepted as Zygoceros bipons Ehrenberg, 1844 (1845)
- Species Hemiaulus bombus Leuduger-Fortmorel, 1898
- Species Hemiaulus californicus Ehrenberg, 1854
- Species Hemiaulus capitatus Greville, 1865
- Species Hemiaulus caracteristicus Hajós, 1976
- Species Hemiaulus cariniferus Grunow in Cleve & Möller, 1878
- Species Hemiaulus caverna Brun, 1891
- Species Hemiaulus centralitenuis R.Ross & P.A.Sims, 1977 † accepted as Maluina centralitenuis (R.Ross & P.A.Sims) R.Ross & P.A.Sims, 1987 †
- Species Hemiaulus chinensis Greville, 1865
- Species Hemiaulus ciesielskii Fenner, 1991 † accepted as Proboscia ciesielskii (Fenner) J.Witkowski, 2020 †
- Species Hemiaulus circularis Leuduger-Fortmorel, 1898
- Species Hemiaulus claviger Schmidt in Schmidt et al., 1888
- Species Hemiaulus conicus Fenner, 1991
- Species Hemiaulus coniferus (Brightwell) M. Peragallo, 1897 accepted as Triceratium coniferum Brightwell, 1856
- Species Hemiaulus coronatus Leuduger-Fortmorel, 1898
- Species Hemiaulus coronatus (Witt) M. Peragallo, 1897 accepted as Trinacria coronata Witt, 1885 †
- Species Hemiaulus crenatus Greville, 1865
- Species Hemiaulus curvatuloides J.Witkowski, 2022 †
- Species Hemiaulus curvatulus N.I. Strelnikova, 1971 †
- Species Hemiaulus danicus Grunow, 1884
- Species Hemiaulus danosuecicus Cleve-Euler
- Species Hemiaulus delicatulus Lemmermann, 1905
- Species Hemiaulus dissimilis Grove & Sturt, 1887
- Species Hemiaulus diversus Grunow, 1884
- Species Hemiaulus dubius Grunow, 1884
- Species Hemiaulus echinulatus Jousé in Proshkina-Lavrenko, 1949
- Species Hemiaulus elegans (P.A.C.Heiberg) Grunow, 1884
- Species Hemiaulus elgeri Hustedt, 1935
- Species Hemiaulus excavatus (Heiberg) Schutt, 1896 accepted as Trinacria excavata f. excavata Heiberg, 1863
- Species Hemiaulus exiguus Greville, 1865
- Species Hemiaulus exsculptus (Heiberg) Schütt, 1896
- Species Hemiaulus februatus P.A.C.Heiberg
- Species Hemiaulus florifer Leuduger-Fortmorel, 1898
- Species Hemiaulus fragilis Jousé, 1949
- Species Hemiaulus fragilis Grunow, 1884
- Species Hemiaulus frigida Grunow
- Species Hemiaulus frigidus (Grunow) Fenner, 1994 accepted as Hemiaulus polymorphus var. frigida Grunow, 1884
- Species Hemiaulus gibbosus Fenner, 1994
- Species Hemiaulus giganteus N.I.Strelnikova accepted as Hemiaulus fragilis Jousé, 1949
- Species Hemiaulus giganteus H.J. Schrader & J. Fenner, 1976
- Species Hemiaulus glacialis Castracane, 1886
- Species Hemiaulus gleseri Hajós, 1974
- Species Hemiaulus gondolaformis Fenner, 1984
- Species Hemiaulus gracilis Fenner in Fenner & Mikkelsen, 1990
- Species Hemiaulus grassus Fenner, 1984
- Species Hemiaulus grevillei (Witt)
- Species Hemiaulus grunowii Pantocsek, 1892
- Species Hemiaulus grunowii (Witt)
- Species Hemiaulus gurowii Pantocsek, 1903
- Species Hemiaulus haitensis Ross, 1971
- Species Hemiaulus hastatus Greville, 1865
- Species Hemiaulus hauckii Grunow ex Van Heurck, 1882
- Species Hemiaulus heibergii Cleve, 1873
- Species Hemiaulus heibergii (Kitton) Okamura, 1911 accepted as Trinacria heibergii var. heibergii Kitton, 1871
- Species Hemiaulus hostilis P.A.C.Heiberg
- Species Hemiaulus huberi Harwood, 1988
- Species Hemiaulus hungaricus Pantocsek, 1886
- Species Hemiaulus hyalinus Krotov in Krotov & Schibkova, 1959
- Species Hemiaulus hyperboreus Grunow
- Species Hemiaulus immanis (Boyer) Hendey & Sims, 1984 accepted as Biddulphia immanis Boyer, 1922
- Species Hemiaulus imperator J.Witkowski, 2022 †
- Species Hemiaulus inaequilaterus Gombos, 1976
- Species Hemiaulus incisus Hajós, 1976 † accepted as Fennerbicornis incisus (Hajós) Blanco, 2020 †
- Species Hemiaulus includens Grunow, 1884
- Species Hemiaulus incurvus K.G.Schibkova in A.I.Krotov & K.G.Schibkova, 1959 †
- Species Hemiaulus indicus Karsten, 1907
- Species Hemiaulus jeremiae (Truan & Witt) M. Peragallo, 1897 accepted as Trinacria jeremiae Truan & Witt, 1888 †
- Species Hemiaulus jordani J.Witkowski, 2022 †
- Species Hemiaulus juventus Vekschina, 1961
- Species Hemiaulus kittonii Grunow in Van Heurck, 1883 † accepted as Fennerbicornis kittonii (Grunow) Blanco, 2020 †
- Species Hemiaulus klushnikovii Gleser in Scheschukova-Poretzkaya & Gleser, 1964
- Species Hemiaulus kondai Hajós, 1974
- Species Hemiaulus kristoffersenii Fenner, 1991
- Species Hemiaulus laevissimus Grunow, 1884
- Species Hemiaulus latus A.P. Jousé, 1948
- Species Hemiaulus latus Schmidt in Schmidt et al., 1888
- Species Hemiaulus lobatus Greville, 1865
- Species Hemiaulus longicornis Greville, 1865 accepted as Williamriedelia longicornis (Grev.) S.Blanco & C.E.Wetzel, 2016
- Species Hemiaulus longispinosus Woodhead & Tweed, 1960
- Species Hemiaulus loricatus (J.Fenner) I.Suto, 2008 † accepted as Goniothecium loricatum J.Fenner, 1976 †
- Species Hemiaulus lyriformis Greville accepted as Williamriedelia lyriformis (Grev.) S.Blanco & C.E.Wetzel, 2016
- Species Hemiaulus malleolus Pantocsek, 1886
- Species Hemiaulus marplatensis Frenguelli, 1928
- Species Hemiaulus maximus
- Species Hemiaulus membranaceus Cleve
- Species Hemiaulus membraneceus Cleve, 1873
- Species Hemiaulus menisculus Jousé, 1951
- Species Hemiaulus mesolejus (Grunow in Van Heurck) De Toni, 1894 accepted as Triceratium mesoleium Grunow in Van Heurck, 1883
- Species Hemiaulus mesolepta (A.Grunow) J.Witkowski, 2020 †
- Species Hemiaulus minimus Leuduger-Fortmorel, 1898
- Species Hemiaulus minutus Greville, 1865
- Species Hemiaulus mirus Schmidt in Schmidt et al., 1888
- Species Hemiaulus mitra Grunow
- Species Hemiaulus monicae Grunow, 1884
- Species Hemiaulus moniliformis Leuduger-Fortmorel, 1898
- Species Hemiaulus morsiana Grunow in Thum, 1885
- Species Hemiaulus morsianus (Grunow) Fenner, 1994 accepted as Hemiaulus polymorphus var. morsiana Grunow, 1884
- Species Hemiaulus mucronatus Greville, 1865
- Species Hemiaulus muticus Strelnikova in Dzinoridze, Jouse & Strelnikova, 1979
- Species Hemiaulus nanus Tynni, 1982
- Species Hemiaulus navicula Ehrenberg
- Species Hemiaulus nocchiae Fenner, 1991
- Species Hemiaulus novocastrensis Ross, 1971
- Species Hemiaulus nudus Hajós, 1968
- Species Hemiaulus obtusus Ehrenberg, 1844
- Species Hemiaulus oceanicus Dolmatova in Dolmatova, Kuklina & Oreshkina, 1984
- Species Hemiaulus oonkii Fenner, 1991
- Species Hemiaulus oreshkinae J.Witkowski, 2022 †
- Species Hemiaulus originalis A.I.Krotov in A.I.Krotov & K.G.Schibkova, 1959 †
- Species Hemiaulus ornithocephalus Greville accepted as Briggera ornithocephala (Greville) Ross & Sims, 1985 †
- Species Hemiaulus orthoceras Strelnikova, 1974
- Species Hemiaulus pacificus (P.A.Sims) A.M.Gombos, Jr. & P.F.Ciesielski accepted as Cerataulus pacificus Hajós, 1976
- Species Hemiaulus paradoxus Ehrenberg
- Species Hemiaulus payeri Grunow, 1884
- Species Hemiaulus peripterus Fenner, 1984 †
- Species Hemiaulus perlongus Pantocsek, 1889
- Species Hemiaulus petasiformis Pantocsek, 1886
- Species Hemiaulus pileolus
- Species Hemiaulus plicatus Sheshukova-Poretskaya, 1967
- Species Hemiaulus podagricus (Greville) Grunow
- Species Hemiaulus podagrosus (Greville) Grunow, 1884 accepted as Biddulphia podagrosa Greville, 1866
- Species Hemiaulus polycistinorum
- Variety Hemiaulus polycistinorum var. brevicornis Jousé, 1951
- Variety Hemiaulus polycistinorum var. charkovianus Jousé, 1955
- Variety Hemiaulus polycistinorum var. mesolepta A.Grunow, 1884 † accepted as Hemiaulus mesolepta (A.Grunow) J.Witkowski, 2020 †
- Variety Hemiaulus polycistinorum var. polycistinorum Ehrenberg, 1854
- Variety Hemiaulus polycistinorum var. siberica Witt, 1885
- Variety Hemiaulus polycistinorum var. simbirskiana Grunow, 1884
- Species Hemiaulus polycystinorum
- Species Hemiaulus polymorphus Grunow
- Species Hemiaulus praelegans Jousé, 1951
- Species Hemiaulus prolongatus Ross & Sims, 1977
- Species Hemiaulus proschkinaelavrenkoae Jousé, 1951
- Species Hemiaulus proteus Heiberg, 1863
- Species Hemiaulus pulvinatus Greville, 1865
- Species Hemiaulus punctatus Greville, 1865
- Species Hemiaulus pungens Grunow, 1884
- Species Hemiaulus pyxilloides Schrader & Fenner, 1976
- Species Hemiaulus quinqueguttatus (Grunow in Van Heurck) De Toni, 1894 accepted as Triceratium quinqueguttatum Grunow in Van Heurck, 1883
- Species Hemiaulus radiatus Ehrenberg
- Species Hemiaulus rectus
- Species Hemiaulus reflexispinosus Ross & Sims, 1977
- Species Hemiaulus regina (Heiberg) Schütt, 1896
- Species Hemiaulus repax Leuduger-Fortmorel, 1898
- Species Hemiaulus reticularis J. Brun, 1896
- Species Hemiaulus reticulatus Greville, 1865
- Species Hemiaulus robustus Greville, 1865
- Species Hemiaulus rossicus Pantocsek, 1889
- Species Hemiaulus rostratus Pantocsek, 1892
- Species Hemiaulus rusticus Frenguelli & Orlando, 1958
- Species Hemiaulus saratovianus Pantocsek, 1889
- Species Hemiaulus schmidti Hajós, 1974
- Species Hemiaulus seymourensis Harwood, 1988
- Species Hemiaulus sibericus Grunow, 1884
- Species Hemiaulus simplex Brun, 1894
- Species Hemiaulus simulacrum (Grove & Sturt) Laporte & Lefebure, 1930
- Species Hemiaulus sinensis Greville, 1865
- Species Hemiaulus solenoceros (Ehrenberg) Boyer, 1900 accepted as Triceratium solenoceros var. solenoceros Ehrenberg, 1844 (1845)
- Species Hemiaulus speciosus Jousé, 1951
- Species Hemiaulus spinosus Leuduger-Fortmorel, 1898
- Species Hemiaulus sporalis N.I. Strelnikova, 1971 †
- Species Hemiaulus stabilus J. Fenner, 1978
- Species Hemiaulus stilliger Ehrenberg
- Species Hemiaulus subacutus Grunow, 1884
- Species Hemiaulus subsymmetricus Grunow, 1884
- Species Hemiaulus symmetricus Greville, 1865
- Species Hemiaulus szabói Pantocsek, 1889
- Species Hemiaulus taurus Gombos in Gombos & Ciesielski, 1983
- Species Hemiaulus tenuicornis Greville accepted as Williamriedelia tenuicornis (Grev.) S.Blanco & C.E.Wetzel, 2016
- Species Hemiaulus tenuicornis sensu Grove & Sturt, 1887
- Species Hemiaulus tenuiformis Grove & Sturt, 1887
- Species Hemiaulus tschestnovii Pantocsek, 1889
- Species Hemiaulus tubulosus J. Brun, 1896
- Species Hemiaulus tumidocornus N.I. Strelnikova, 1971 †
- Species Hemiaulus undulatus Jousé, 1951
- Species Hemiaulus unicornutus Brun, 1891
- Species Hemiaulus velatus Leuduger-Fortmorel, 1898
- Species Hemiaulus velatus Fenner, 1991
- Species Hemiaulus verrucosus Brun, 1894
- Species Hemiaulus vesicarius Strelnikova in Dzinoridze, Jouse & Strelnikova, 1979
- Species Hemiaulus virgata Fuge, 1937
- Species Hemiaulus vitreus Gombos, 1983
- Species Hemiaulus vulgaris Leuduger-Fortmorel, 1898
- Species Hemiaulus walfishii Leuduger-Fortmorel, 1898
- Species Hemiaulus weissflogii Pantocsek, 1892
- Species Hemiaulus weissii Grunow, 1884
- Species Hemiaulus wittii Grunow, 1884
- Genus Hemiaulus C.G. Ehrenberg, 1844 accepted as Hemiaulus P.A.C. Heiberg, 1863
- Genus Keratophora J. Pantocsek, 1889 †
- Genus Kittonia E. Grove & G. Sturt, 1887 †
- Genus Pseudorutilaria (Grove & Sturt ex De Toni & Levi) Grove & Sturt ex De Toni, 1894 †
- Genus Riedelia A.P. Jousé & V.S. Sheshukova-Poretzkaja, 1971 accepted as Williamriedelia T.V. Desikachary & P. Prema in Prema & Desikachary, 2012 †
- Genus Rymariopsis J.Witkowski & D.M.Harwood, 2011 †
- Genus Sphynctolethus G D. Hanna, 1927 †
- Genus Strelnikovia R. Ross & P.A. Sims, 1985
- Genus Trinacria P.A.C. Heiberg, 1863 †
- Genus Williamriedelia T.V. Desikachary & P. Prema in Prema & Desikachary, 2012 †
- Genus Williamriedelia S.Blanco & C.E.Wetzel, 2016 † accepted as Williamriedelia T.V. Desikachary & P. Prema in Prema & Desikachary, 2012 † (5)
- Family Streptothecaceae Crawford, 1990
- Order Triceratiales (168)
- Superorder Chaetocerotanae (95)
- Superorder Corethranae (1)
- Superorder Coscinodiscanae (300)
- Superorder Cymatosirophycanae (10)
- Superorder Lithodesmiophycanae (7)
- Superorder Rhizosolenianae (37)
- Superorder Thalassiosiranae (192)
- Order Arcanodiscales (5)
- Order Stictocyclales
- Subclass Fragilariophycidae (483)
- Order Centrales
